基于紫外光固化的挤塑聚苯板表面改性及与砂浆黏结性能研究  

Surface modification of extruded polystyrene foams through UV curing and their interfacial strength with mortar

作　　者：施妍 金晓冬 孙诗兵[1] 吕锋[1] 田英良[1] 赵志永 刘辉[1] SHI Yan;JIN Xiaodong;SUN Shibing;LYU Feng;TIAN Yingliang;ZHAO Zhiyong;LYU Hui(Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学材制学部,北京100124

出　　处：《中国塑料》2023年第6期1-9,共9页China Plastics

摘　　要：通过紫外光固化技术在挤塑聚苯板(XPSF)表面固化微米级厚度的聚氨酯丙烯酸酯(PUA)涂层,旨在提高XPSF表面润湿性的同时引入可与砂浆反应的官能团以强化二者之间的界面结合。通过测量样品的黏度、傅里叶变换红外光谱、静态接触角和拉伸黏结强度,探究活性稀释剂二缩三丙二醇二丙烯酸酯(TPGDA)添加量对PUA涂层性能及改性XPSF/砂浆之间黏结性能的影响规律。结果表明,随着TPGDA用量的增加,PUA涂料黏度逐渐下降,涂层形貌随之发生变化;XPSF表面静态接触角从90.78°降至55°左右,有利于砂浆的铺展润湿;随着TPGDA用量的增加,拉伸黏结强度呈先上升后下降的趋势,当添加量为60%(质量分数,下同)时拉伸黏结强度为0.213 MPa,为未改性的4.26倍;该样品浸水后干燥7 d的耐水拉伸黏结强度进一步提高至0.230 MPa。To improve the surface wettability of extruded polystyrene foams(XPSF)and introduce functional groups that can strengthen the reactions with mortar,polyurethane acrylate(PUA)with a micron thickness was coated on the XPSF surface using a UV-curing technology.The effect of tripropylene glycol diacrylate(TPGDA)on the performance of PUA coating and the bonding performance between the modified XPSF and mortar were investigated by using viscometry,Fourier-transformation infrared spectroscopy,static contact angle meter,and universal testing machine.The results indicated that the viscosity of PUA coating decreased along with a change in the micromorphology of the coating with an increase in the TPGDA content.The static contact angle of XPSF decreased from 90.78°to 55.00°,which facilitated the spreading and wetting of mortar.The tensile strength of the XPSF/mortar composites increased at first and then decreased with increasing the TPGDA content.The composites obtained tensile strength of 0.213 MPa at a TPGDA content of 60 wt%.This result is 4.26 times higher than that of the blank sample.Their water-resistant tensile strength was further increased to 0.230 MPa after immersion in water and then drying for 7 days.

关 键 词：挤塑聚苯板 聚氨酯丙烯酸酯 表面改性 紫外光固化 拉伸黏结强度 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]